Energy budget in the lambari monoculture and integrated cultures with Amazon river prawn and curimbatá.

Author(s)

Paulo Victor Leme Mantoan

• Document type: Master's Dissertation
• Press: Jaboticabal. 2021-03-23.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2021-02-22
• Advisor: Wagner Cotroni Valenti; Érico Tadao Teramoto

Abstract

Integrated systems improve the use of natural resources and associated with the rational use of energy can increase sustainability in aquaculture. The knowledge of the energy budget demonstrates how the energy in its different forms is distributed in the ecological compartments of the system from the inputs and outputs of energy in Megajoule (MJ) for each cultivation system. This experiment lasted two months, with three treatments and four replications, the monoculture of yellow-tailed lambari (Astyanax lacustris - LM) and integrated culture of yellow-tailed lambari with Amazon river prawn (Macrobrachium amazonicum - LCa) and yellow-tailed lambari, Amazon river prawn, and curimbatá (Prochilodus lineatus - LCaC). The lambaris were fed a commercial diet (32% CP) twice a day and the other species were fed with waste classified in the system. Were measured as solar and atmospheric radiation to calculate the budget of heat available in the ponds, and collected from incoming, infiltrating, and leaving the water, animals, feed, sediment, CH4 absorbed and emitted. Electricity and human labor inflows were estimated. Based on these data, the energy budget of the three systems and the heat balance were determined. The total energy input was the same in all systems, it implements an average of 241.8 ± 10x10³ MJ ha-1. Although there was no difference in the total input for the systems, the energy incorporated in the total biomass of economic interest is greater in LCaC with 80.1 ± 10x10³ MJ ha-1. The total energy output was higher in the system with three species (463.4 ± 31.1x10³ MJ ha-1). The total energy input from short wave (SW) and longwave (LWa) radiation was 1018.4 ± 126.6 MJ ha-1 and the total energy output through the longwave through water (LWw), heat latent evaporation (λE), and sensitive heat flow (C) for 261.6 ± 42.1 MJ ha-1. Thus, the heat budget is 756.7 ± 102.5 MJ ha-1. Therefore, the system production of lambari integrated with the Amazon river prawn and curimbatá constitute a more energy-efficient production system, increasing sustainability and the available heat budget, highlighting the capacity of the ponds to store heat for the functioning of the entire ecosystem. (AU)

• FAPESP's process: 18/23993-9 - Energy budget in the lambari monoculture and integrated cultures with Amazon river prawn and curimbatá
• Grantee: Paulo Victor Leme Mantoan
• Support Opportunities: Scholarships in Brazil - Master